How to use strlen() function in PHP

The strlen function is a built-in function in PHP that calculates the length of a string, including all spaces and special characters; it takes a given string as a parameter and returns its length. [Video tutorial recommendation: PHP tutorial]

Basic syntax

strlen($string)

Parameters: strlen() function Accepts only one parameter $string, which is required. This parameter represents the string whose length needs to be returned.

Return value: The strlen() function returns the length of the given string ($string), including all spaces and special characters contained in the string.

Let’s take a look at how to use the strlen() function through an example.

Example 1:

<?php 
    $str = "hello PHP"; 
      
    // 输出字符串的长度
    echo strlen($str); 
?>

Output:

9

Example 2:The output contains special characters and The length of the string of the escape sequence

<?php 
    $str = "\n chetna ;";
      
    // 输出字符串的长度,字符串中包含特殊字符和转义序列
    echo strlen($str); 
?>

Output:

10

Explanation: The escape sequence '\n' here is recorded as 1 character.

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